Unified Carrier Registration. Done.

UCR stands for Unified Carrier Registration, the program that replaced the old Single State Registration System back in 2007. It's federal in origin (49 U.S.C. §14504a), state in administration. The fees go to a national pot, the UCR Plan Board sets the schedule each year, and your base state collects on everyone's behalf and distributes the revenue.

Every interstate commercial carrier owes it. That means motor carriers (for-hire and private), brokers, freight forwarders, and leasing companies that operate across state lines. Intrastate-only operators don't. Fleet size is irrelevant for whether you owe; fleet size is everything for how much you owe.

The 2027 fee schedule, set by FMCSA at 49 CFR §367.50 (Federal Register, September 1, 2026):

• 0 to 2 vehicles: $55 (also the rate for brokers and leasing companies)
• 3 to 5 vehicles: $167
• 6 to 20 vehicles: $333
• 21 to 100 vehicles: $1,163
• 101 to 1,000 vehicles: $5,548
• 1,001 and up: $54,165

Bracket boundaries are where this bites. Twenty power units is $333. The twenty-first is $1,163 — $830 more for one truck. Dockex counts your active power units and shows you the bracket before you file, so the number isn't a surprise. And worth knowing which way the count runs: trailers don't count toward UCR, only power units do, so a trailer purchase can't push you up a bracket.

The calendar that matters: registration opens October 1, the registration year runs January 1 to December 31, and enforcement kicks in January 1. Pay between October 1 and December 31, you stay clean. Miss December 31, and starting New Year's Day every roadside inspection flags your vehicles as out-of-compliance until payment clears. Fines vary by state but they hit the same CSA safety file an expired plate would.

The scope, plainly: UCR is a federal program with one national registration system, so your base state doesn't change who can file. Dockex counts the power units, lands the bracket, and builds the application on any plan. File it yourself in-app for free, or Dockex files it for you for a flat $45 — any base state. The published UCR fee you pay the UCR system directly; we never mark it up and never hold it. The count, the prep, and the December 31 deadline all run underneath.

One operational note: even states that don't directly participate in the UCR Plan (Oregon, Arizona, Wyoming, DC, Nevada, Florida, Maryland, Vermont, New Jersey, Hawaii as of the current cycle) still enforce UCR at roadside. Being "based" in a non-participating state doesn't exempt you; it just means your base-state assignment for filing purposes is technically different.

Where UCR usually goes sideways: bracket jumps and December blindness. A fleet sitting at 19 trucks adds two more to cover a seasonal push, and the count that goes on the renewal quietly moves them from the 6 to 20 bracket ($333) into the 21 to 100 bracket ($1,163). Same with brokerages adding a fleet through acquisition. The boundary slips past the team until the renewal shows the new number, and by then there's no time to budget for it. Dockex computes the bracket from your active power units when you file, so the right bracket is on the application — not discovered in October.

The other quiet trap: UCR uses the term "commercial motor vehicle" in a slightly different way than IRP. Power units count, including straight trucks and truck-tractors. Trailers don't. Owner-operators leased onto another carrier's authority generally fall under that carrier's UCR (not their own). If you swap carriers mid-year and your authority changes, the obligation moves with the authority.

For the full deadline stack UCR plugs into, the Oklahoma fleet compliance checklist walks through how UCR sits next to IFTA quarterly returns, IRP renewal, Form 2290, and MCS-150 biennial updates. The small fleet management guide covers what a sensible compliance calendar looks like at 5 to 25 trucks.